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1.
Due to compact structure of meta-aramid fiber caused by the intermolecular hydrogen bondings of amide groups, the degree of crystallinity increased, thus its poor dyeing properties arises. Among commercial dyes used in many previous researches, the basic dyes showed comparatively higher exhaustion yields as comparing to those of disperse dyes and acid dyes. The anthraquinone moiety was adopted for good performances of light fastness on meta-aramid fiber. In this study, eight of anthraquinone dye was synthesized. The three of them were obtained from chloro-anthraquinone, by Ullmann reactions with the corresponding heterocylic residues such as morpholine and one of them was obtained from lueco quinizarine by condensation with the corresponding heterocylic residues. The others were prepared by quaternization from dyes above. The synthesized disperse and cationic dyes were dyed on meta-aramid fibers and investigated for their build-up dyeing properties and wash fastness. 相似文献
2.
Dyeing characteristics and fastness of 100 % m-aramid fiber with some commercial dyes were investigated on various dyeing conditions, such as using a swelling agent and
electrolyte as auxiliaries. Among commercial dyes used, the basic dyes showed comparatively higher exhaustion yield comparing
to those of disperse dyes and acid dyes. Under acidic conditions in the range pH 3 to 5, preferably between pH 3 and 4, the
stability of cationic dyes could be enhanced leading to higher adsorption. Dye exhaustions of trichromatic dyes were increased
proportionally to concentration of swelling agents ranging from 1 to 4 g/l. The addition of electrolyte provided increased K/S values after washing process compared with those of blank dyeings, where the greatest effect was observed with NaNO3. 相似文献
3.
Kwon Sun Lee Beom Soo Lee Young Hwan Park Yoon Chul Park Yong Min Kim Sung Hoon Jeong Sung Dong Kim 《Fibers and Polymers》2005,6(1):35-41
Research and development of nano fiber products is very active over the world. Physical characteristics and dyeing properties
of nylon 66 nano fiber were investigated in this study. X-ray diffraction, DSC, analysis of amino end group, and water absorption
were performed to get information concerning physical properties of nano fiber. Nylon 66 nano fiber was dyed with high molecular
mass acid dyes. Effects of dyeing temperature, pH of dyeing solution, and concentration of acid dyes on dyeing properties
such as rate of dyeing and the extent of exhaustion, were examined and compared to those of regular fiber. It was found that
nano fiber adsorbed acid dyes at lower temperature, got rapidly dyed, and its extents of exhaustion at specific dyeing temperature
were higher than regular fiber. It was also observed that nano fiber could adsorb a large amount of acid dye without a significant
loss in the extent of exhaustion. Washing fastness of the dyed nano fiber was lower by 1/2∼1 grade, light fastness by 1 grade
than the dyed regular fiber. 相似文献
4.
Dyeing characteristics of meta-aramid fibers were investigated in supercritical carbon dioxide by employing three disperse dyes and a carrier. The effects of dyeing temperature, pressure, time, dye concentration, CO2 flow, and carrier concentration on dyeing properties were investigated. The results showed that meta-aramid fiber could be dyed in supercritical carbon dioxide. Its color depth was improved with increasing dyeing temperature, pressure, time, dye concentration, CO2 flow, and carrier concentration. Moreover, the color depth could be significantly improved by adding the carrier. The dyeing procedure of supercritical carbon dioxide fluid did not influence the chemical structure and antistatic properties of the meta-aramid fiber. The maximum decomposition temperature and breaking strength of the dyed meta-aramid fiber are slightly increased. The dyed meta-aramid fiber in supercritical carbon dioxide had good fastness, which was rated at 4–5. 相似文献
5.
The nonionic reverse micelles used for dyeing cotton fiber were prepared with a non-ionic surfactant Triton X-100 (TX-100) by injecting small amount of reactive dye aqueous solution. The adsorption capacity of three water-soluble anionic azo dyes including Reactive Blue 222, Reactive Red 195 and Reactive Yellow 145 onto cotton fiber was investigated. The Langmuir and Freundlich isothermals were employed to model the adsorption data. In addition, the color strength and fixation rate of cotton fabrics dyed in the reverse micelles and bulk water were examined and compared. The salt and alkali as influencing factors were also discussed. The FT-IR spectra were employed to study the polarity of water added in reverse micelles. The results indicated that the adsorption of the dyes onto cotton showed better agreement with Langmuir model. The adsorption process was monolayer adsorption. Reactive Yellow 145 with lower negative charge and higher hydrophilicity exhibited the higher adsorption capacity. The fixation percentage and color strength of the cotton fiber dyed in TX-100 reverse micelles was higher than those in bulk water. The polarity of water in TX-100 reverse micelles was lower than that in bulk water. 相似文献
6.
A diblock copolymer (PEO45-MeDMA) derived from [2-(methacryloyloxy)ethyl]trimethylammonium chloride (MeDMA) was synthesized and applied to the dyeing
of the meta-aramid fibers with some acid dyes. This copolymer created positive charges on meta-aramid fiber surface and a
strong attraction with anionic groups of acid dyes. Meta-aramid fabric was pretreated using the synthesized copolymer and
then dyed with two commercial acid dyes. The dyeability was found to be directly dependent on the concentration of PEO45-MeDMA, pH in the dyebath as well as dye concentration. The color fastness of the copolymer pretreated dyed fabric was also
evaluated. 相似文献
7.
The dyeing properties of hydrophobic polypropylene fibers using cationic dyes were investigated to improve dyeability by electron
beam irradiation and sulfonic acid incorporation. The color strength of polypropylene fibers after irradiation was examined
according to the dyeing conditions including the pH of the dyebath, absorbed doses, and the introduction of a functional group
to the fiber substrate. The best dyeing result was obtained when polypropylene fibers incorporated by sulfonic acid group
after electron beam irradiation were dyed with cationic dyes at alkaline conditions and 30∼75 kGy irradiation ranges. 相似文献
8.
Three unreported cationic reactive dyes based on azobenzene were synthesized using a novel synthetic route. Synthesized dyestuffs containing three primary color dyes were characterized by FTIR, H-NMR, LC-MS, Element Analysis and UV-vis spectroscopic techniques. The absorption spectra of dyes were measured in three solvents with different polarities. The dyeing and color fastness properties of three cationic reactive dyes on wool, acrylic and wool/acrylic blend fabrics were determined. The optimum pH for wool and acrylic fabrics were 6 and 5, respectively. Effect of temperature, time on dyeing properties and color fastness properties on wool fabric showed the same tendency with acrylic fabric. The K/S value of wool fabric dyed with three dyes was similar to that of acrylic fabric when both fabrics were dyed simultaneously in the same dyebath using low dye concentration. Wool/acrylic blend fabric dyed with three cationic reactive dyes using onebath one-step method achieved good union dyeing property and excellent color fastness. 相似文献
9.
Poly(lactic acid) (PLA) is known for environmentally friendly material as it is derived from annually renewable crops and biodegradable. Dispersant-free dyeing of PLA fabric with three temporarily solubilized azo disperse dyes which contain β-sulfatoethylsulfonyl group was investigated and their dyeing and fastness properties were compared with those of commercial disperse dyes. The temporarily solubilized azo disperse dyes were successfully applied to PLA fabric without the use of dispersant. The color yield on PLA fabric was dependent on dyebath pH and dyeing temperature as well. The optimum results were obtained at pH 7-8 and 110 °C. The dyes showed markedly higher color yield on PLA fabric when compared to commercial disperse dyes. Wash fastness was very poor to poor but light fastness was good. The COD levels of the dyeing effluent from the temporarily solubilized disperse dyes were considerably lower than those from commercial disperse dyes. 相似文献
10.
Nine disperse dyes have been synthesized by diazotization of 2-amino-4-(p-nitrophenyl)-5-nitrothiazole and coupled to substituted
N-alkylanilines. Spectral properties in the IR and visible range of the dyes obtained were investigated. The dyeing performance
of these dyes was assessed on nylon and polyester fibers. These dyes were found to give reddish brown to bluish violet shades
on dyeing with very good depth, brightness and levelness on nylon and polyester fibers. The dyed fibers showed fairly good
light fastness, very good to excellent fastness to wash, rubbing, perspiration and excellent fastness to sublimation. The
dyebath exhaustion and fixation on the fiber were found to be very good. 相似文献
11.
The present paper deals with improvement in disperse dyeability as well as imparting of cationic dyeablility to difficultly
dyeable polypropylene by a melt blending technique. Isotactic polypropylene (PP) was blended with fibre grade polybutylene
terephthalate (PBT), cationic dyeable polyethylene terephthalate (CDPET) and polystyrene (PS), individually. The resulting
binary blends were spun and drawn into fibres at draw ratio 2, 2.5, and 3. The compatibility of blends, structural changes
of fibres in terms of X-ray crystallinity, relative crystallinity, sonic modulus, birefringence and thermal stability were
examined. The blended fibres were found to be disperse dyeable by the conventional method of high temperature and high pressure
dyeing. And this dyeability increased with increase in the level of substitution. PP/CDPET blend also exhibited dyeablility
with cationic dyes in addition to that with disperse dyes. The optimum level of blending was predicted keeping in view of
tenacity and thermal stability of melt blend fibres. The wash fastness properties of the dyed fibres were found to be of high
rate. 相似文献
12.
Azohydroxypyridone disperse dyes containing a fluorosulfonyl group were dyed on PET/cotton blends and their dyeing and fastness
properties were investigated. Specially, the azohydroxypyridone dyes containing a nitro group in place of the fluorosulfonyl
group in the para position to azo group were synthesized in order to compare their dyeing and fastness properties on PET/cotton blends with
those of fluorosulfonyl-substituted analogues. As these dyes can be alkali cleared in the same bath, a one-bath dyeing method
was used and the results were compared with that of a conventional two-bath dyeing method. In particular, the cross-staining
of cotton was studied in order to assess their suitability for the one-bath dyeing of PET/cotton blends. 相似文献
13.
The dyeing and color fastness properties of three reactive-disperse dyes containing a sulphatoethylsulphone group on Nylon,
cotton and N/C mixture fabrics were examined. Reduction-clearing was more effective in removing the unfixed dyes than soaping
since the reactive-disperse dye became hydrophobic during dyeing process. Nylon was dyed well with three reactive-disperse
dyes at pH 5∼8 and difference in chemical structure between dyes did not affect the final color strength of the dyed Nylon
fiber, but their build-up properties on Nylon were not so good. The color strength of the dyed cotton was not as high as that
of Nylon. The color strength of cotton increased by lowering dyeing temperature when the reactive-disperse dyes having hydroxy
group were used. Nylon absorbed more dye molecules than cotton in simultaneous dyeing, the color difference between Nylon
and cotton could be reduced as the dyeing temperature decreased. N/C mixture fabric was dyed well at 60 °C with the reactive-disperse
dyes having hydroxyl group when applied at pH 7 and 60 °C, and their build-up properties were good. It was also found that
washing fastness and rubbing fastness of dyed Nylon, cotton and N/C fabrics with the reactive-disperse dyes were excellent,
while light fastness was moderate. 相似文献
14.
Dispersant-free PTT dyeing of temporarily solubilized azo disperse dyes based on pyridone moiety which contain β-sulfatoethylsulfonyl
group was investigated. The dyes were successfully applied to PTT without the use of dispersants. The color yields of the
dyes on PTT fabric were dependent on dyeing pH as well as dyeing temperature. The optimum results were obtained at pH 5–6
and 110 °C. The dyes showed alkali-clearing property and exhibited good to excellent fastness on the PTT fabric. The COD levels
of the dyeing effluent from the temporarily solubilized disperse dyes were much smaller than those from commercial disperse
dye. 相似文献
15.
The dyeability of poly(lactic acid) (PLA) fiber strongly depends on disperse dye structure due to the low dyeing temperature and the short dyeing time. Thus, the dye uptake value of PLA fiber is low for some disperse dyes and is needed to be improved. In the current study, the dyeability of PLA fiber is improved with the addition of N-Phenylaminopropyl polyhedral oligomeric silsesquioxane (AP-POSS) during melt spinning process. The effects of dyeing conditions including dyeing temperature and time, disperse dye type and AP-POSS concentrations are investigated on the dyeability properties of PLA fiber samples. The tensile, thermal and morphological properties of fiber samples are also characterized by tensile testing, differential scanning calorimeter (DSC), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). As the added amount of AP-POSS increases, the percent crystallinity increases and the tensile strength reduces. According to the dyeing results, AP-POSS is very effective for increasing the dyeability of PLA fiber especially for disperse dyes with low dye uptake values. 相似文献
16.
Mikyung Kim Seokhan Yoon Taekyeong Kim Jin-seok Bae Namsik Yoon 《Fibers and Polymers》2006,7(4):352-357
The cotton fabrics were pretreated by sodium 2-(2,3-dibromopropionylamino)-5-(4,6-dichloro-1,3,5-triazinylamino)-benzenesulfonate
(DBDCBS) at alkaline condition of room temperature and then dyed with four disperse dyes having amino groups (C.I. Disperse Yellow
9, C.I. Disperse Red 11, C.I. Disperse Blue 56 and C.I. Disperse Violet 1) at acidic condition of high temperature. A novel
hetero-bifunctional bridge compound,DBDCBS, has two reactive groups such as dichloro-s-triazinyl group andα, β-dibromopropionylamido group. The first has reactivity towards hydroxy group of cellulosic fiber and the second shows reactivity
towards amino groups of disperse dye containing amino groups. The results indicate that it is possible to dye polyester/cotton
blend at one-bath dyeing using one kind of disperse dye containing amino groups. Therefore, two kinds of dyeing methods such
as two-bath process one-bath dyeing and one-bath process one-bath dyeing were investigated and their dyeabilities were compared.
The differences between these two methods were negligibly small so that perfect one-bath one-step dyeing of polyester/cotton
blend by one kind of disperse dye was achieved. 相似文献
17.
Chuanxiang Qin Ren-Cheng Tang Bo Chen Dawei Chen Xiaomei Wang Guoqiang Chen 《Fibers and Polymers》2010,11(2):193-198
Three hemicyanine dyes were employed in dyeing acrylic fabrics following traditional cationic dyeing procedures. The influence
of the substituting groups of the dye molecule on the sorption rate and sorption isotherms was analyzed. The results showed
that those dyed acrylic fabrics using hemicyanine dyes had obvious fluorescent effect in the spectra range 550–750 nm. In
addition, according to the EN-471 standard (2003), the chromaticity of dyed acrylic fabric was calculated to evaluate whether
hemicyanine dye could meet the requirements of the fluorescent dye for high visibility warning clothing. 相似文献
18.
Herein, we report the synthesis and dyeing property of cationic copper phthalocyanine (cationic CuPc). The synthesized cationic CuPc was characterized using UV-Vis spectra and it showed good solubility in aqueous solution over a wide pH range. The dyeing of cationic CuPc was successfully employed onto acrylic fiber. The dyeing of acrylic fiber using cationic CuPc was achieved using conventional method. The effects of five important variables such as liquor ratio, dye concentration, dyeing time, temperature and pH were examined on the color strength (K/S) of dyed acrylic fiber. The maximum color strength was obtained at lower liquor ratio (100:1), higher dye concentration (6 %), longer dyeing time (60 min), 120 °C and alkaline condition (pH 11). 相似文献
19.
Effects of chemical structure of disperse dyes applied to conventional and microdenier polyesters on the dyeing property and
washfastness were studied. It was found that washfastness of dyed polyester fabric is closely related to the degree of thermomigration
of disperse dye during heatsetting. The bulky disperse dye, which was synthesized by substituting two acetoxy groups of C.I.
Disperse Red 82 with two benzoxy groups, showed almost the same amount of absorbed dye by the microdenier polyester as C.I.
Disperse Red 82, but the degree of thermomigration was low and subsequent washfastness was excellent. The high grade of washfastness
of the bulky disperse dye might be caused by the increased dye-fiber interaction and the reduced mobility. 相似文献
20.
The polymer optical fiber with trade name Flexi was used in this research, because of its flexibility and the range of diameters available in the market. These fibers were dyed using commercial disperse dye under various conditions of dye concentration and dyeing time. Samples were analyzed for side emission of light with the use of an instrument which was specifically designed for the measurement of this nature. The results showed that the dye penetration is dependent on time, if dye concentration and temperature are kept constant. After 40 min of dyeing, the fiber core showed an increase in side emission with lower loss due to attenuation. Excessive time in the hot conditions also degraded the fiber, so that the fiber became very stiff and brittle. Fibers were also subjected to heat, in the form of boiling water bath, for selected periods of time, and it was found that the effect was similar to that of the prior experiments. Surface treatment of Flexi fibers was carried out using ethyl acetate as an etching agent, to possibly accept more disperse dye on the fiber surface. The results after dyeing showed a more significant improvement in both side emission and attenuation of light. 相似文献